nios2: fix bootm error on fdt args
We should check argv[3] only if there are enough args. Otherwise,
it might cause invalid memory access fault.
Signed-off-by: Thomas Chou <thomas@wytron.com.tw>
Signed-off-by: Scott McNutt <smcnutt@psyent.com>
diff --git a/arch/nios2/lib/bootm.c b/arch/nios2/lib/bootm.c
index e25a113..40a4d15 100644
--- a/arch/nios2/lib/bootm.c
+++ b/arch/nios2/lib/bootm.c
@@ -42,7 +42,7 @@
if (boot_get_fdt(flag, argc, argv, images, &of_flat_tree, &of_size))
return 1;
#endif
- if (!of_flat_tree)
+ if (!of_flat_tree && argc > 3)
of_flat_tree = (char *)simple_strtoul(argv[3], NULL, 16);
if (of_flat_tree)
initrd_end = (ulong)of_flat_tree;